Sound box and attachment



May 27 1924. 1,495,888

' F. B. CROSIER SOUND BOX AND ATTACHMENT Filed May 5. 1921 .3 Sheets-Sheet 1 -& 7

May 27 -19.24. 1,495,888

F. B. CROSIER SOUND BOX AND ATTACHMENT Filed May 5. 1921 s Sheets-Sheet 2 awe/M70 2 ,31 0703a??? May 27 1924. 1,495,888

F. B'. CROSIER SOUND BOX AND ATTACHMENT Filed May 5 1921 5 Sheets-Sheet 5 avway toz Witmaoo C 7'OSZ G7 Patented May 27, 1924.

UNITED STATES.

FRANK B. CROSIER, on UNIVERSITY, i/IIssIssIPr fAssIeNoR on oiwn-nnnn'ro AIR-THUR BOONE caosnan, on UNIVEasITY, :MIssISsIPI I.

soulvn'nox AND ATTACHMENT.

Application filed May 5,

To all whom it may concern Be it known that I, FRANK B. CRosInR, a citizen of the United States, residing at University, in the county of Lafayette and State of Mississippi, have invented certain new and useful Improvements in Soundv Boxes and Attachments; andI do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and usethe same.

This invention relates to an improved attachment forsound boxes of the type used in association with sound r'eproducingmachines such as phonographs and the like,

although, it isnot toibe restricted to this particular use. I I

. More specifically speaking, I aim to provide a novel attachment. of the class described which has considerably more mass than the vibrating bar on which it is supported, the device functioning as-a weight to such an extent that the inertia of the system is increased, thus absorbing a great deal of the energy and inhibiting to a corresponding degree the vibratory action of the vibrating bar, whereby to obtain the result specified.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same Figure 1 is a side elevational viewof one embodiment of the aforesaid device constructed in accordance with thisiinvention, showing the same attached to a sound box, the housing for the casing being 'shownin section. I

Figure 2 is a top plan view thereof with the casing in section! Figure 3 is a sectional view taken substantially on the plane of-the line .33 of Fig 2;. Figure 4: is a view similar to Fig. :1 disclosing a different embodiment of the invention.

Figure 5 is a topplan-view thereof.

Figures 6 and? are sectional views taken substantiallyonthe planes ofjthe lines 66 and 7-7 respectively of Fig. 4:.

Figure 8 is a detail perspective-view of the device with the casing removed.

Figure 9 is a view similarto Fig.4: dis closing still another modified form of the invention.

Figure 1015 i i-"view approximating that 1921; 1 Serial no. ;4a7,0 21.

Sincethe general'principle of operation involved is identical in all embodiments of the invention, I have grouped them in a 10 ical order and will describe each embo iment separately.

For the purpose of enabling the reader to obtain acleariunderstanding of the invention, the same is shown in association with. a conventional type of sound box designated in all figures by the letter A. The construction of thesound-box is well known and by observing the drawings, it will be seen thatthe same includes a metallic vibrator B, a stylus holder C in which the'qneedle is held, the latter being designed to travel in the usual undulations on the record to receive and transmit vibrations to the diaphragm E. i

l-R-eferring' now to the drawings and confining attention to Figs. 1 to 3 inclusive, it willbe seen that the device here illustrated comprises a metallic frame 1 includingra 1at-' orally directed portion 2 equipped at its free end with'a clamp 3 of anysuitable construc- I tion, this clamp being designed for connec tion to the vibrator, bar B at anysuitable point. The frame 1 serves: as asupport'for a suitably shaped resonant body 4 prefer.- ably inthe form of a relatively thin board of vibrating material. In the present showing, the body is composed of a plurality of separate pieces or sections 5 of varying lengths which may-be connected in any appropriate manner to the side bars of the frame. As will be observed, the sections5 are spaced vertically from one another; At itsupper' end, the frame is'provided witha pair of spaced diverging arms 6 to which the free ends of a wire 7 are connected in any suit'alole manner. As better seen in Fig. '3, this wire is bent intoV-shapeand itsend's secured to the ends. of the arms 6 as"indi another embodiment of the invention will be seen. Here, the body is likewise in the form of aboard 14, but instead of being com posed of the sections of varying lengths as before described, it isin one-piece. This body .is likewise adapted to be'disposed in spaced parallelism with the diaphragm of the sound box. Connected to the board 14 by'means of a screw v15 is a second and smaller board 16 which may be conveniently referred to as an auxiliary board, the same serving to add more mass to the'structure and to absorb vibrations to a more pronounced degree. This board 16 is connected to the bar B through the medium of an attaching. arm 17 equipped with a detachable clamp 18. If desired, a small rubber sleeve 19 may surround the screw 15 to act as a spacer between the two boards, This embodiment'of the invention, like the one already described, includes an arm 20 which is detachably clamped to thevibrator bar as indicated at 21 and this arm is formed at its outer end with a hook 22 which isen gaged with the intermediate portion of the wire 23 which is also bent to assume the shape shown and has its opposite free ends connected to the board 14 by means of screws or their equivalents 24. Rubber sleeves 25 are also employed to surround the screws 24. This form of the invention also includes a tension device or member 26 for one stretch of the wire and further includes the protecting housing or casing 27..

Confining attention now' to Fig. 9, it will be seen that the device here shown is a substantial duplicate of the one just' described with the exception of the wire and tension device associated therewith, these parts being omitted, and the arm 20 being directly connected to the lower central portion of the board as shown. The analogy of these two forms of the invention permits the same reference characterstobe used to designate all like parts.

The embodiment of the invention disclosed in Fig. 10 is quite similar to the one shown in. Figs. 4 to 8 inclusive with the exception that the auxiliary board is omitted, the attaching arm 17 employed to connect said board to the'vibrator bar, being directly connected to theloWer centraII portion of themain board asindicated' at 30.

In addition to the embodiment of the invention already described, there is still an other embodiment shown in Figs. 11 and'1% said vibratory bar.

Confining attention to these figures, we observe that 31 designates a substantially disklike board which is arranged in parallelism and spaced from the diaphragm of the sound box, being held in this position by means of an arm 33 having a clamp 84 'detachably connected with the vibrator bar. A' substantially semi-cylindrical metallic screen 35 is connected in any appropriate manner to the outer face of the board and ispreferably supported in the properposition by means of a curved arm or its equivalent 36 which is connected therewith and detachably connected at 37 with the vibrator bar. The elastic character of the screen serves further to impede the movement of the vibrating bar on its fulcrum and adds the desired mass to .this embodiment of the invention. If desired, a casing or housing 38may be employed here.

In use, the invention simply provides a structure that has much more mass than the vibrating bar upon which it is mounted. Hence, it functions as a weight to such an extent that it increases the inertia of the system. Thus, much of'the energy; of the system will be absorbed and the vibratory action of the bar B will be inhibited to a corresponding degree and the use of such a device will be found as a" material asset to tonebetterment. The principle of operation, as before stated, ofall of the embodiments of the invention is the same. Iclaim: J

1. A device of the class described com prising an attachment for the vibrating bar ofa diaphragm, said attachmentembodying a horizontally disposed arm connected to said bar, a substantially V-shaped wire, the intermediate portion of which is connected with the free end of said arm, and connections between the ends of said wire and 2. The structure specified in claim 2; together with a tension device supported adjacent said wire to engage at least one stretch thereof. H

3. A device of the class described comprising an arm adapted for connection to the vibrating bar of a diaphragm, a substantially V-shaped wire having its intermediate portion connected to the free end of said arm, and a vibratory body connected with said bar, the free endsof said V -shaped wire being in association with said body.

4. A device of the class described comprising an arm to be connected to a'vibrat ing bar of a diaphragm, a body adapted for disposition in spaced parallelism with respect to said diaphragm, a connection bebrating bar of a sound box comprising a body of vibrating material, said body being composed of a plurality of vertically spacedsections and being adapted to be disposed in spaced relation With respect to the diaphragm, and an arm connected to said body and extending laterally therefrom for supporting the body on the bar to increase the inertia of the system. 1

6. A device of the class described comprising a frame adapted to be supported on a diaphragm vibrating bar, a plurality of vertically spaced members carried by said frame, said members being of varying lengths. 1

7. A device of the class described comprising a frame adapted to be supported in spaced parallelism with respect to the diaphragm of a sound-box, means forsupporting said frame from a vibrator bar of the diaphragm, said frame including a pair of spaced arms at its top, a plurality of vertically spaced members of vibrating material carried by said frame, a horizontally disposed arm adapted for connection to the aforesaid bar, anda wireconnected with said arms and with the aforesaid diverging arm. I

In testimony whereof I have hereunto set my hand.

FRANK B. GROSIER. 

